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Peterbilt 379 Parts

At 4 State Trucks, you’ll find everything you need to keep your iconic 379 model running strong and looking sharp. From bumpers and exhausts to fuel tanks, fenders, and chrome trim, we’ve got Peterbilt accessories and parts designed to fit your specific model year (87’ – 07’). Whether it’s a full-body restoration, a small component replacement, or a custom upgrade, our lineup has what you need.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • BESTfit DEF Doser Injector Kit Replaces 2121300001 For Cummins

    BESTfit DEF Doser Injector Kit Replaces 2121300001 For Cummins

    BESTFIT TRUCK PARTS

    $131.99
    Diesel Exhaust Fluid Doser Injector Kit By BESTfit Fits CumminsDepend on strong emissions system performance with the BESTfit DEF Doser Injector Kit, a replacement for 2121300001. Designed for...
    09-06070003
    SKU:
    09-06070003
    Position:
    Kit Full
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $131.99
    Qty in Cart: 0
    Price:
    $131.99
    Subtotal:
  • BESTfit Charge Air Cooler 37.25 x 33.375 x 2 Inch For Peterbilt

    BESTfit Charge Air Cooler 37.25 x 33.375 x 2 Inch For Peterbilt

    BESTFIT TRUCK PARTS

    $1,181.99
    Tube And Fin Charge Air Cooler W/ 4 Inch Inlet & Outlet By BESTfitThe BESTfit Charge Air Cooler Tube and Fin for Peterbilt is a high-performance solution designed to keep your engine running...
    01-070100005
    SKU:
    01-070100005
    Width Options:
    33 1/2 Inch
    Height Options:
    37 Inch
    Product Type:
    Engine Parts
    Make:
    Peterbilt
    $1,181.99
    Qty in Cart: 0
    Price:
    $1,181.99
    Subtotal:
  • BESTfit Air Operated Fan Hub For Peterbilt Replaces F176014M34, 10024141

    BESTfit Air Operated Fan Hub For Peterbilt Replaces F176014M34, 10024141

    BESTFIT TRUCK PARTS

    $434.99
    Air Operated Fan Hub By BESTfit Replaces F176014M34, 10024141 Fits PeterbiltRestore dependable cooling performance with the BESTfit Air Operated Fan Hub Replacing F176014M34 and 10024141 for...
    01-07060018
    SKU:
    01-07060018
    Product Type:
    Engine Parts
    Make:
    Peterbilt
    $434.99
    Qty in Cart: 0
    Price:
    $434.99
    Subtotal:
  • Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Paccar MX-13

    Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Paccar MX-13

    BULLY DOG

    $5,000.00
    Choose Option(s) to see description.Fitment** Fits Models W/ PACCAR MX-13 Engines 2010-2013Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator Replaces 5355091 For Paccar MX-13Paccar MX-13 Stage 1 VGT...
    PPR_300802
    SKU:
    PPR_300802
    Material Options:
    Billet Aluminum
    Product Type:
    Engine Parts
    Style Options:
    Paccar
    Make:
    Universal Items
    Make:
    Other - Semi-Truck
    $5,000.00
    Qty in Cart: 0
    Price:
    $5,000.00
    Subtotal:
  • Bully Dog Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins X15 CM2350 & CM2450

    Bully Dog Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins X15 CM2350 & CM2450

    BULLY DOG

    $6,000.00
    Experience more responsive power and improved engine efficiency with this Stage 1 Billet Wheel VGT Turbo Charger with Actuator, designed for Cummins X15 Low or High HP engines and replacing 5459710...
    PPR_300798
    SKU:
    PPR_300798
    Material Options:
    Billet Aluminum
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Other - Semi-Truck
    Make:
    Universal Items
    $6,000.00
    Qty in Cart: 0
    Price:
    $6,000.00
    Subtotal:
  • Limited Quantity Available
    BESTfit A/C O- Ring Kit For Early Or Late Model Applications

    BESTfit A/C O- Ring Kit For Early Or Late Model Applications

    BESTFIT TRUCK PARTS

    $4.99 - $14.99
    Ensure a secure, leak-free seal in your air conditioning system with the BESTfit A/C O-Ring Kit for early or late model applications. This high-quality kit is made from durable EPDM material,...
    PPR_300804
    SKU:
    PPR_300804
    Color:
    Green
    Product Type:
    Engine Parts
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $4.99 - $14.99
    Qty in Cart: 0
    Price:
    $4.99 - $14.99
    Subtotal:
  • Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins ISX15, X15 & QSX

    Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins ISX15, X15 & QSX

    BULLY DOG

    $4,750.00
    If your goal is smoother boost and reduced turbo lag, this Stage 1 VGT Turbo Charger offers a refined upgrade path. Featuring a billet aluminum compressor wheel and upgraded diffuser plates, the...
    PPR_300797
    SKU:
    PPR_300797
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Material Options:
    Billet Aluminum
    Make:
    Other - Semi-Truck
    Make:
    Universal Items
    $4,750.00
    Qty in Cart: 0
    Price:
    $4,750.00
    Subtotal:
  • Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins ISX 871

    Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins ISX 871

    BULLY DOG

    $4,750.00
    Maximize torque, efficiency, and reliability with the Stage 1 Billet Wheel VGT Turbo Charger with Actuator, replacing 3774613/2881993/4309078 for Cummins ISX 871 engines. The aluminum billet...
    PPR_300799
    SKU:
    PPR_300799
    Material Options:
    Billet Aluminum
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Other - Semi-Truck
    Make:
    Universal Items
    $4,750.00
    Qty in Cart: 0
    Price:
    $4,750.00
    Subtotal:
  • Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins ISB 6.7L

    Stage 1 Billet Wheel VGT Turbo Charger W/ Actuator For Cummins ISB 6.7L

    BULLY DOG

    $4,398.00
    Boost your Cummins ISB 6.7L performance with the Stage 1 Billet Wheel VGT Turbo Charger with Actuator, a direct replacement for 3789505/6411490/6411519. Its aluminum billet wheel, Cobalt VGT cage,...
    PPR_300800
    SKU:
    PPR_300800
    Product Type:
    Engine Parts
    Material Options:
    Billet Aluminum
    Style Options:
    Cummins
    Make:
    Other - Semi-Truck
    Make:
    Universal Items
    $4,398.00
    Qty in Cart: 0
    Price:
    $4,398.00
    Subtotal:
  • Load- Share Steer Axle Ride Kit Fits 3.5 Or 4 Inch Leaf Spring With Square Top U-Bolts & Standard U-Bolt Spacing

    Load- Share Steer Axle Ride Kit Fits 3.5 Or 4 Inch Leaf Spring With Square Top U-Bolts & Standard U-Bolt Spacing

    LOAD-SHARE SUSPENSIONS

    $1,085.99 - $1,252.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models of TrucksLoad- Share Steer Axle Ride Kit Fits 3.5 Inch Leaf-Spring With Square-Top U-Bolts & Standard U-Bolt...
    PPR_300796
    SKU:
    PPR_300796
    Position:
    Kit Full
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $1,085.99 - $1,252.99
    Qty in Cart: 0
    Price:
    $1,085.99 - $1,252.99
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  • 304 SS Quarter Fender Bracket For Peterbilt Low Air & Kenworth AG400L Suspension

    304 SS Quarter Fender Bracket For Peterbilt Low Air & Kenworth AG400L Suspension

    HOGEBUILT FENDERS

    $455.99
    Choose Option(s) to see description.Fitment* Fits Kenworth C500 2005 thru Current* Fits Kenworth K260 2007 thru 2012* Fits Kenworth K360 2007 thru 2012* Fits Kenworth K270 2013 thru Current* Fits...
    PPR_300784
    SKU:
    PPR_300784
    Material Options:
    Stainless Steel
    Position:
    Driver Side
    Product Type:
    Rear Fenders
    Truck Class:
    Heavy Duty
    Position:
    Passenger Side
    Make:
    Kenworth
    Make:
    Peterbilt
    $455.99
    Qty in Cart: 0
    Price:
    $455.99
    Subtotal:
  • BESTfit Square Hood Bushing Replaces For Kenworth & Peterbilt

    BESTfit Square Hood Bushing Replaces For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $13.87 - $15.72
    Reduce Hood Vibration and Wear with the BESTfit Square Rubber or Poly Hood Bushing for Kenworth and Peterbilt. Crafted from premium materials, this square bushing with a 0.50-inch inner diameter...
    PPR_300787
    SKU:
    PPR_300787
    Material Options:
    Plastic/Poly
    Shape Options:
    Square
    Product Type:
    Hood Parts & Acc.
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    $13.87 - $15.72
    Qty in Cart: 0
    Price:
    $13.87 - $15.72
    Subtotal:
  • FREE SHIPPING OVER $249
    Steel Fender Rear Mounting Bracket For Peterbilt Low Airleaf & Kenworth Ag400L Suspension 2005 & Newer

    Steel Fender Rear Mounting Bracket For Peterbilt Low Airleaf & Kenworth Ag400L Suspension 2005 & Newer

    SHIFT PRODUCTS

    $149.99
    This steel fender bracket is made for installing the fender on either the driver side or passenger side of Peterbilt Low Airleaf trucks from 2005 and newer, as well as Kenworth trucks with AG400L...
    PPR_300780
    SKU:
    PPR_300780
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Position:
    Driver Side
    Position:
    Passenger Side
    Product Type:
    Rear Fenders
    Make:
    Kenworth
    Make:
    Peterbilt
    $149.99
    Qty in Cart: 0
    Price:
    $149.99
    Subtotal:
  • FREE SHIPPING OVER $249
    Chrome Round Cat's Eye Headlight Cover

    Chrome Round Cat's Eye Headlight Cover

    UNITED PACIFIC

    $12.71 - $12.72
    Choose Option(s) to see description.Fitment* Fits Freightliner Century 1996 thru 2004* Fits Freightliner FLC112 1995 thru 1995* Fits GMC Brigadier 1978 thru 1988* Fits GMC General 1977 thru 1998*...
    PPR_300790
    SKU:
    PPR_300790
    Product Type:
    Lighting
    Diameter Options:
    7 Inch
    Finish Options:
    Chrome-Plated
    Shape Options:
    Round
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    International
    Make:
    Kenworth
    Make:
    Freightliner
    Make:
    Sterling
    Make:
    Volvo
    Make:
    Mack
    Make:
    GMC
    Make:
    Peterbilt
    $12.71 - $12.72
    Qty in Cart: 0
    Price:
    $12.71 - $12.72
    Subtotal:
  • Driver/Passenger Side Steel Half Fender Bracket For Peterbilt Low Airleaf & Kenworth Ag400L Suspension

    Driver/Passenger Side Steel Half Fender Bracket For Peterbilt Low Airleaf & Kenworth Ag400L Suspension

    SHIFT PRODUCTS

    $170.99
    This half fender bracket is designed for secure mounting of fiberglass fenders on Peterbilt trucks with Low Airleaf suspension (2005 and newer) and Kenworth trucks with AG400L suspension. Made for...
    PPR_300783
    SKU:
    PPR_300783
    Position:
    Driver Side
    Position:
    Passenger Side
    Product Type:
    Rear Fenders
    Material Options:
    Steel
    Type Options:
    Half
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    $170.99
    Qty in Cart: 0
    Price:
    $170.99
    Subtotal:
  • BESTfit Hood Pivot Bushing For Kenworth & Peterbilt

    BESTfit Hood Pivot Bushing For Kenworth & Peterbilt

    BESTFIT TRUCK PARTS

    $23.12 - $26.83
    Restore accurate hood alignment on Kenworth and Peterbilt trucks with the BESTfit Hood Pivot Bushing, replacement for OEM L13-6006. This high-quality rubber or poly bushing measures 4.625 inches...
    PPR_300786
    SKU:
    PPR_300786
    Material Options:
    Plastic/Poly
    Product Type:
    Hood Parts & Acc.
    Shape Options:
    Rectangular
    Truck Class:
    Heavy Duty
    Make:
    Kenworth
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $23.12 - $26.83
    Qty in Cart: 0
    Price:
    $23.12 - $26.83
    Subtotal:
  • Stainless Steel Rear Fender Bracket For Peterbilt Low Airleaf & Kenworth Ag400L Suspension 2005 & Newer

    Stainless Steel Rear Fender Bracket For Peterbilt Low Airleaf & Kenworth Ag400L Suspension 2005 & Newer

    SHIFT PRODUCTS

    $155.99 - $162.99
    Choose Option(s) to see description.Fitment* Fits Kenworth T2000 2005 thru 2010* Fits Kenworth T300 2005 thru 2007* Fits Kenworth T370 2009 thru 2021* Fits Kenworth T600 Aerocab 2005 thru 2007* Fits...
    PPR_300781
    SKU:
    PPR_300781
    Material Options:
    Steel
    Product Type:
    Rear Fenders
    Truck Class:
    Heavy Duty
    Position:
    Driver Side
    Position:
    Passenger Side
    Make:
    Kenworth
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $155.99 - $162.99
    Qty in Cart: 0
    Price:
    $155.99 - $162.99
    Subtotal:
  • Stainless Steel Fender Bracket Driver/Passenger Option For Peterbilt Flex Air And Kenworth Ag380 Suspension

    Stainless Steel Fender Bracket Driver/Passenger Option For Peterbilt Flex Air And Kenworth Ag380 Suspension

    SHIFT PRODUCTS

    $162.99 - $177.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 330 2002 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2014 thru 2022* Fits Peterbilt 340 2007 thru 2010* Fits Peterbilt...
    PPR_300782
    SKU:
    PPR_300782
    Material Options:
    Steel
    Position:
    Passenger Side
    Truck Class:
    Heavy Duty
    Product Type:
    Rear Fenders
    Position:
    Driver Side
    Make:
    Kenworth
    Make:
    Peterbilt
    $162.99 - $177.99
    Qty in Cart: 0
    Price:
    $162.99 - $177.99
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    Legendary Underboss Large Glass Watermelon 4 Wire Dual Function W/ Stainless Bezel LED Light - Each

    Legendary Underboss Large Glass Watermelon 4 Wire Dual Function W/ Stainless Bezel LED Light - Each

    LEGENDARY

    Now: $42.49
    Was: $49.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksLegendary Underboss Large Glass Watermelon Amber-Blue-Clear 4 Wire Dual Function W/ Stainless Bezel LED...
    PPR_300765
    SKU:
    PPR_300765
    Color:
    Amber/Green
    Color:
    Red/Blue
    Diameter Options:
    3 1/2 Inch
    Style Options:
    Watermelon
    Color:
    Amber/Blue
    Color:
    Amber/White
    Color:
    Amber/Red
    Color:
    Red/White
    Color:
    Red/Purple
    Position:
    Under
    Color:
    Amber/Purple
    Color:
    Red/Green
    Material Options:
    Glass
    Make:
    Universal Items
    Make:
    Dodge
    Product Type:
    Lighting
    Ready To Ship:
    Yes
    Now: $42.49
    Was: $49.99
    Qty in Cart: 0
    Price:
    Now: $42.49
    Was: $49.99
    Subtotal:
  • BESTfit John Deere Gasket 10.875 Inch ID 11.750 Inch OD

    BESTfit John Deere Gasket 10.875 Inch ID 11.750 Inch OD

    BESTFIT TRUCK PARTS

    $18.99
    10.875 Inch ID 11.750 Inch OD John Deere Gasket By BESTfitUpgrade your exhaust sealing system with the BESTfit John Deere Gasket, designed for John Deere applications and built to replace worn or...
    80-08090002
    SKU:
    80-08090002
    Product Type:
    Exhaust
    Make:
    Universal Items
    $18.99
    Qty in Cart: 0
    Price:
    $18.99
    Subtotal:
  • Total: items /

Adding your products to cart

Shop for Repair & Performance Parts for the Peterbilt 379

We stock aftermarket parts from top-tier brands, each engineered to meet or exceed classic OEM Peterbilt 379 parts for both newer and older 379 model years. Replacement parts reduce downtime and can enhance the efficiency of your big rig. Easily swap out worn-out or broken mechanical components: - Turbochargers and exhaust manifolds. - Radiators, heater hoses, and electrical components. -Peterbilt 379 front shocks, air-ride suspension hardware and drivetrain or powertrain replacements. Installing high-quality aftermarket performance upgrades can lead to a positive ROI and stronger performance. Whether your Peterbilt needs an exhaust system upgrade or an extensive suspension rebuild, we've got the parts to get the job done.

Add Polished Chrome Upgrades

Elevate your truck's look with exterior chrome parts: stainless steel visors, grilles, rear fenders, and front bumpers for Peterbilt 379. Add larger Peterbilt diesel fuel storage tanks and a new set of Peterbilt 379 chrome stack tops.

Customize the Interior with Peterbilt 379 Accessories

Our Peterbilt 379 interior accessories let you mix and match designs to fit your truck's theme. For decades, we've helped source parts for drivers to build their custom show trucks. Customizing the interior? If you can dream it, there's likely a product to help you build it. Browse through dash trims, upholstery, dual-tone interior cab lights, vent trim covers, custom foot pedals, and more. Interior accessories help to customize the entirety of your rig. You can add unique rear sleeper window shapes, chrome-polished mirror accessories, cabin doors, and in-cab vinyl flooring kits. When it comes to fine-tuning your custom interior, there are endless options. Filter through a vast selection of products via the materials, design features, sizes, and aftermarket brands that truckers trust. At the bottom of the page, you can review the item details, check for product specs, search for limited-time discounts on popular items, and add the order to cart. Easy.

Frequently Asked Questions About Peterbilt 379 Parts

What years are Peterbilt 379 parts compatible with, and will they fit my specific model?

Most Peterbilt 379 parts fit 1987–2007 trucks, but fitment depends on the exact part and your setup (standard vs extended hood, trim packages, modifications). Always confirm OEM specs and model details before ordering. For custom builds, contact support with your truck info.

What's the difference between aftermarket and OEM Peterbilt 379 parts in terms of quality and durability?

OEM parts match factory specs and usually cost more. Quality aftermarket parts can perform similarly for 30–50% less, especially for chrome and accessories. Look for strong materials (ex: 16-gauge+ bumpers), good plating/finishing, and a warranty—avoid ultra-cheap parts that rust or peel quickly.

How difficult is it to install Peterbilt 379 bumpers and what tools do I need?

Most installs take 2–4 hours with basic tools: socket set (especially 3/4" and 7/8"), torque wrench, jack stands/lift, and ideally a helper. Many bumpers use factory mounts; some may need minor drilling. Rusted hardware and alignment are the usual challenges. Pro install is often $200–$400.

What chrome and finish options are available for Peterbilt 379 parts, and how do they hold up?

Triple chrome: best shine, needs regular upkeep (especially in winter). Powder coat: tough and chip-resistant, less mirror-like. Polished stainless: higher upfront cost, won’t rust, low maintenance. Choose based on climate and how much maintenance you want to do.

Which Peterbilt 379 parts should I prioritize replacing for both appearance and functionality?

Start with safety items (headlights/marker lights). Next, replace rust-prone parts like bumpers, battery boxes, and step plates. Then move to high-impact upgrades like air cleaners and exhaust. Interior items (dash panels, handles) improve daily comfort. Prices can vary. Budget $2,000-5,000 for a comprehensive exterior refresh, or tackle projects individually starting with the most visible or damaged components.


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